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Scientists Pinpoint Cause of 2023 Temperature Spike
· Confirmed
In Short: Researchers from the Alfred Wegener Institute have uncovered a possible explanation for the abrupt temperature spike in 2023: a reduction in low-level cloud cover has diminished Earth's capacity to reflect solar radiation.
Researchers from the Alfred Wegener Institute have uncovered a possible explanation for the abrupt temperature spike in 2023: a reduction in low-level cloud cover has diminished Earth's capacity to reflect solar radiation.
According to the study, without the reduced albedo since December 2020, the mean temperature in 2023 would have been approximately 0.23 degrees Celsius lower.
The eastern North Atlantic, a key driver of the latest jump in global mean temperature, was characterized by a substantial decline in low-altitude clouds not just in 2023, but also over the past ten years.
The global mean temperature climbed to nearly 1.5°C above preindustrial levels in 2023, marking an unprecedented high.
Notably, there remains an unexplained gap of about 0.2°C in the global temperature rise, which Dr. Goessling described as 'one of the most intensely discussed questions in climate research.'
In addition to the influence of El Niño and the expected long-term warming from anthropogenic greenhouse gases, several other factors have been discussed that could have contributed to the surprisingly high global mean temperatures since 2023.
The Atlantic particularly stands out as the region where the most unusual temperature records were observed in 2023.
What this adds
This reduction in reflectivity may help explain the additional warming.
Background
Scientists have also discovered that consuming beverages at very high temperatures can increase the risk of esophageal cancer.
What's confirmed
- What they found: without the reduced albedo since December 2020, the mean temperature in 2023 would have been approximately 0.23 degrees Celsius lower.
- Researchers face a significant challenge in pinpointing the causes of this sudden spike.
- In this regard, the Atlantic particularly stands out, i.e., exactly the same region where the most unusual temperature records were observed in 2023.
- Among them, the global mean temperature climbed to nearly 1.5°C above preindustrial levels, marking an unprecedented high.
- Notably, there remains an unexplained gap of about 0.2°C in the global temperature rise.
- Researchers uncover a possible explanation for the abrupt temperature spike in 2023: a reduction in low-level cloud cover diminishes Earth’s capacity to reflect solar radiation.
What's still developing
- This reduction in reflectivity may help explain the additional warming.
- The two studies cited by the authors on squid temperature sensitivity, expressed as Q10 values, showed different figures for different species: 1.60 to 2.01 for small juvenile oval squid and 2.1 for adult jumbo squid.
- For over ten years, scientists have put forward two different explanations for one of the ocean’s more unusual trends: the increase in squid numbers between 1970 and 2010.
- Squid that live in coastal, shallow waters also experience more stable conditions in terms of food and temperature than do deep-diving oceanic species, and this could cause them to respond differently both to warming and to the loss of predators than the single general squid group in this model.